Simon Riggs <[EMAIL PROTECTED]> writes: > On Fri, 2008-05-30 at 12:31 +0530, Gurjeet Singh wrote: >> On Fri, May 30, 2008 at 10:40 AM, Tom Lane <[EMAIL PROTECTED]> wrote: >>> But since you mention it: one of the plausible answers for fixing the >>> vacuum problem for read-only slaves is to have the slaves push an xmin >>> back upstream to the master to prevent premature vacuuming. >> >> I think it would be best to not make the slave interfere with the >> master's operations; that's only going to increase the operational >> complexity of such a solution.
> We ruled that out as the-only-solution a while back. It does have the > beauty of simplicity, so it may exist as an option or possibly the only > way, for 8.4. Yeah. The point is that it's fairly clear that we could make that work. A solution that doesn't impact the master at all would be nicer, but it's not at all clear to me that one is possible, unless we abandon WAL-shipping as the base technology. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers